JPS60247549A - Single facer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a single face sani which is a unit constituting a corrugator and which manufactures a corrugated hole on one side.

(Prior art) In the conventional single facer, as shown in FIG. 3, the base paper 8 is supplied to the upper roll 1 side, and is bitten into the meshing part of the upper roll 1 and the lower roll 2, forming a wave shape. Base paper 8' formed on
Next, the base paper 8' is transferred with 20 rotations of the lower roll, the glue 7 in the glue container 6 is scooped up by the glue roll 4, and the glue film is adjusted by the doctor roll 5, after which the glue is applied. Gluing is applied to the top of the base paper 8' by the roll 4. On the other hand, the liner 9 supplied to the pressure roll 3 side and the glued base paper 8' are adhered to each other at the pressing portions of the lower roll 2 and the pressure roll 3 to form a single-sided corrugated paperboard 10. In the conventional single facer shown above, the upper roll 1 is generally pressed against the lower roll 2, and the pressure roll 3 is pressed against the lower roll 2 at a linear pressure of 20 to 60 kg/m. The former is a pressing force for forming a step on the base paper 8, and the latter is a pressing force for providing adhesive force between the base paper 8' and the liner 9. 1. The lower roll 2 has a tooth-shaped step formed on the outer surface of the roll along with the upper roll 1. On the other hand, the pressure port 3 has a smooth surface, so that the steps on the lower roll are not formed during operation. It has a structure in which the surface of the pressure roll 3 is struck at high cycles through a base paper 8' and a liner 9. In such a structure, the upper roll 1, the lower roll 2
and pressure roll 3 are mainly [lower roll 2 and pressure roll 3]
The main component is the tooth number cycle NZ of the upper and lower corrugating rolls 1 and 2 (corrugating roll rotation speed N Z), and when the tooth number cycle NZ matches the natural frequency of the roll system, resonance occurs, and the three rolls in particular vibrate violently. During such resonance, especially the pressure roll 3
As the lower roll 2 collides violently, a large collision load is applied to the base paper 8' and the liner 9 sandwiched between the rolls, which may cause the sheet to break or, depending on the phase of the vibration, the base paper 8' ′ and the liner 9 may not be bonded together, and furthermore, a large amount of noise may be generated.

The above-mentioned problems have become more of a problem in recent years as machines become faster and sheet quality tends to deteriorate.

This reduces vibrations generated in rolls, etc.

Single facers have been proposed to reduce noise.

One example is the structure shown in FIG. The pressure roll 3' has a cylindrical core 14 formed around the axis C, and on the outer periphery of the cylindrical core 14, a relatively thin (about 5+ nm to 20 nm) cylindrical core is formed around the axis C. A sleeve 13 is fitted into the cylindrical core 14 and the cylindrical sleeve 1.
A gap (approximately 2 to 10+n+n) is formed between 3 and 3. A low melting point alloy 15 such as solder is sealed in the gap. As described above, the structure is such that the cylindrical sleeve 13 is made relatively thin and a low melting point alloy is filled in the gap between the two, thereby alleviating the impact force and damping the vibrations of the sleeve 13. Cylindrical core 14 and cylindrical sleeve 13
The low melting point alloy 15 sealed in the gap also serves to ensure heat conductivity. In other words, steam is introduced into the interior of the two cylindrical cores 14 to raise the temperature of the surface of the cylindrical sleeve 13 to 160 to
It is maintained at 220° C. and serves to improve heat transfer between the two cylindrical cores 14 and cylindrical sleeves 13 in order to rapidly gel the liquid starch paste for bonding the liner 9 and the core 8'. It's working.

However, in this pressure roll, steam is introduced into the center of the cylindrical core 14 as a heating source, so the thickness of the core 14 must be made thin in order to improve heat conduction efficiency to the surface of the cylindrical sleeve 13. .

There is a new problem in that the natural frequency of the core 14 resonates with the excitation and vibration method of the lower roll 2 due to the tooth number cycle NZ within the operating speed range of the single facer, causing large noise.

(Means for Solving Problems) The present invention was proposed to solve the above-mentioned conventional drawbacks, and is a single facer equipped with an upper roll, a lower roll, a pressure roll, and a pasting roll. It consists of a thick-walled cylindrical core and a cylindrical sleeve inserted into the core at a distance, and a steam introduction pipe is provided in the gap between the core and the sleeve, and the other space is filled with a low-melting point metal. A steam introduction pipe as a heating source is provided between the core and the sleeve to increase heat transfer efficiency, and the core wall thickness is increased, its natural frequency is increased, and the In addition to being able to avoid resonance with the frequency of the excitation force, the thin sleeve and low melting point alloy allow
The present invention aims to provide a single facer that can reduce noise by attenuating impact force and elastic vibration.

(Example) The present invention will be explained by referring to the most preferred illustrated embodiment shown in FIGS. 1 and 2. In the figure, 20 is a pressure roll, and the other structure is the same as the conventional one. The pressure roll 2o has a thick cylindrical core 21. It consists of a thin cylindrical sleeve 22 attached to the outer periphery of the core 21 at intervals. A large number of steam introduction pipes 23 are provided in the gap between the core 21 and the sleeve 22.

The introduction pipe 23 is connected to a steam source (not shown) via the shaft end of the pressure roll 20. Further, the gap is filled with a low melting point metal 24 such as solder.

The present embodiment is constructed as described above, and the base paper 8 is fed to the upper roll 1 side, formed into a corrugated lined paper 8' by the upper roll 1 and the lower roll 2, and then the top of the corrugated paper is formed by the gluing roll 4. At the same time, it is pasted with the liner 9 sent to the pressure roll 20 side to form a two-sided corrugated board 10.

At this time, the thin sleeve 22 alleviates the impact force caused by the collision of the flutes of the lower roll 2, and furthermore, the low melting point metal 24 damps the elastic vibrations of the sleeve 22. In addition, the steam introduction pipe 23
Since the sleeve 22 is heated by the steam introduced through the low melting point metal 24, the sleeve 22 can be efficiently maintained at a constant temperature without considering the thermal resistance of the core 21 as in the conventional case. . Therefore, the wall thickness of the core 21 was reduced to 40 mm compared to the conventional thickness.
! As a result, the natural frequency becomes large, and the frequency of the excitation force does not match the operating speed range.

(Effects of the Invention) As described above, according to the present invention, the impact force caused by the collision of the ridges of the lower roll is alleviated with the thin sleeve, the elastic vibration is damped with the low melting point metal, and the wall thickness of the core is increased. hand,
By increasing its natural frequency, it is possible to avoid resonance with the frequency NZ of the excitation force within the operating speed range of the single facer, which not only reduces the generation of large noise due to resonance, but also effectively reduces noise overall. can be prevented.

[Brief explanation of drawings]

1 and 2 show one embodiment of the present invention. Figure 1 is a partially cutaway front view of the pressure roll;
The figure is a cross-sectional view of a pressure roll, FIG. 3 is a side sectional view of a conventional single facer, FIG. 4 is a partial front view with a part of FIG. FIG. 6 is a partial side sectional view of the single facer, and FIG. 6 is a partially cutaway front view of FIG. 1... Upper roll, 2... Lower roll, 4... Gluing roll, 20... Pressure roll, 21 Cylindrical core. 22... Cylindrical sleeve, 23... Steam introduction pipe. 24...Low melting point metal. 1 - Rijinzaka Competition No. 10 To - 2nd Kasumi Proceedings Amendment (Voluntary) IB September 2010 / 'FJ Case Display 1980 Patent Application No. 104328 Name of Invention Single Facer Amendment Patent Applicant Address 2-5i-11 Kuunouchi, Chiyoda-ku, Tokyo Name (62G) Representative of Mitsubishi Heavy Industries, Ltd. Person Address IFJ Mitsubishi Heavy Industries, Ltd., 2-5 Marunouchi, Chiyoda-ku, Tokyo (Telephone 212-3111) Fan 1 Figure 20

Claims (1)

[Claims] A single facer comprising an upper roll, a lower roll, a pressure roll, and a gluing roll. The pressure roll is composed of a thick-walled cylindrical core and a cylindrical sleeve inserted into the core at a distance, and a steam introduction pipe is provided in the gap between the core and the sleeve, and other spaces are provided. A single facer characterized by being filled with a low melting point metal.